HMS M2 (1918)

	HMS M2 retrieving her Parnall Peto seaplane.
History
United Kingdom
Name	HMS M2
Builder	Vickers
Laid down	1916
Launched	19 October 1918
Fate	Sank during exercise, 26 January 1932
General characteristics
Class & type	M-class submarine
Displacement	1,594 long tons (1,620 t) (surfaced); 1,946 long tons (1,977 t) (submerged);
Length	295 ft 9 in (90.14 m)
Beam	24 ft 8 in (7.52 m)
Installed power	2,400 hp (1,800 kW) (diesel engines); 3,200 hp (2,400 kW) (electric motors);
Propulsion	2 × 12-cylinder Vickers diesel engines; 4 × electric motors; 2 × 3-blade, 5 ft 10 in (1.78 m) diameter propellers;
Speed	15 kn (17 mph; 28 km/h) (surfaced); 8–9 kn (9.2–10.4 mph; 15–17 km/h) (submerged);
Range	2,000 nmi (2,300 mi; 3,700 km) at 15 kn (17 mph; 28 km/h); 4,500 nmi (5,200 mi; 8,300 km) at 10 kn (12 mph; 19 km/h);
Endurance	80 nmi (92 mi; 150 km) at 2 kn (2.3 mph; 3.7 km/h)
Test depth	200 ft (61 m) - accidentally reached 239 ft (73 m) in 1923
Complement	62
Armament	1 × 12-inch (305mm)/40 cal Mark IX gun with 50 rounds (removed 1928); 1 × 3 in (76 mm) Mk II HA anti-aircraft gun; 4 × 18 inch (450 mm) bow torpedo tubes with 4 reload torpedoes;
Aircraft carried	1 × Parnall Peto seaplane
Aviation facilities	Hangar and Hydraulic catapult

HMS M2 was a Royal Navy submarine monitor completed in 1919, converted in 1927 into a submarine aircraft carrier. She was wrecked in Lyme Bay, Dorset, Britain, on 26 January 1932. She was one of three M-class boats completed.